Seamless-bottom sack or bag and the process of making the same.



No. 822,081- PATENTED MAY 29, 1906. K. SANO.

SEAMLESS BOTTOM SACK OR BAG AND THE PROCESS OF MAKING THE SAME.

APPLICATION FILED APR.20, 1905.

2, SHEETS-SHEET 1.

\vxilsg Anna: nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn c.

-No. 822,081. PATENTED MAY 29, 1906.

K. SAND. SEAMLESS BOTTOM SAOK OR BAG AND THE PROCESS OF MAKING THE SAME.

APPLICATION FILED APR. 20, 1905 2 SHEETS-SHEET 2,

munsw. a, mum co FHOYO-LIYHUGRAPMERS. WASHINGTON, ay 0.

when STATES PATENT omen.

KASHIUHI SANO, OF TOKYO, JAPAN.

SEAMLESS-BOTT OM SACK OR BAG AND THE PROCESS OF MAKING THE SAME.

Specification of Letters Patent.

Patented May 29, 1906.

To all whom it may concern:

Be it known that I, KAsHrcHI SANo, a subject of the Emperor of Japan, residing in Tokyo, Japan, have invented a new and useful Seamless-Bottomed Sack or Bag and the Process of Making the Same, of which the following is a specification.

My invention relates to sacks or bags of woven or textile material, and has for its object the production of a bottomed seamless sack or bag, together with the process of making said bag.

A further object of my invention is to devise a process for making said bags by which the same may be made economically and rapidly and with a minimum of technical skill and also to provide a bag from which the contents may not be stolen or abstracted without this fact being at once apparent.

A further object is to provide a bag of great strength which shall have no joints or seams and other points of weakness and to provide a bag in which the adjacent surfaces are woven with common warp and weft threads.

The manner in which my invention is accomplished and the means for carrying out the same are fully described in the following specification, of which the accompanying drawings form a part.

Figure 1 of said drawings represents a view in perspective showing the manner of arranging the warp and the performance of the first step of my invention. Fig. 2 shows the process and the work at the second stage with the changes in position and arrangement being shown by dotted lines. Fig. 3 is a view showing a further step in the process,

' and Fig. 4 shows the completed bag.

In the several views the same referenceletters are applied to corresponding parts.

In carrying out the invention the warp is arranged upon a loom, as shown, the warpthreads being divided into three parts or sec tions, of which A represents the middle part, and B and C represent the outer parts or sections. These warp-threads are divided, as described, by means of heddles o, u, and w, respectively. The warp is arranged on the loom in the usual manner, :10 being the clothbeam.

. A portion of fabric is woven by means of the weft-threads D sufficient to form the front or one side L of the bag, an allowance of weft-threads d" d being left at each side for a purpose to be hereinafter explained. The outer portions of the fabric (indicated by the letters M and N) constituted by the outer portions of the warp passing through the heddles u and w form two sides of the bag. (See Figs. 2, 3, and 4.) The length of fabric thus woven will be substantially equivalent to the length or depth of the bag to be made.

When a suitable length has been woven in the manner above described, the outer portions B and O and the warp-threads are cut or severed, as indicated by the dotted lines 1 2 and 3 4, Fig. l, leaving the central por tion of the warp intact. These cuts should be made at such a distance from the woven front or portion of the fabric to leave free ends, as indicated-by the letters I) and c. The warp is then detached from the cloth-beam.

As the next step of the work the woven end of the fabric is secured to the cloth-beam and the warp stretched for the next step, the sides M and N being brought around in the position shown in Figs. 2 and 3 and the portions 1) and c woven on both sides of the cen* tral portion A of the warp, these portions b c of the thread being long enough to meet and pass each other for a short distance from each direction. In weaving in these loose ends I) 0 care should be taken to distribute the meeting ends equally over the surface of the fabric. This step forms bottom P. (Indicated in Fig. 2.) As the next step the last weaving front is secured to the cloth-beam 00, as before, and the front and sides L M are brought up so that the free ends cl d of the weft may be woven into the portion A of the warp from both sides similar to the manner in which the portions b 0 were woven in, care being taken to distribute the knots over the surface. This step (illustrated in Fig. 3) forms the remaining side R of the bag. The woven bag is then cut off, all surfaces cleaned and finished, and the mouth of the bag finished in any suitable manner, such as by hem ming or otherwise.

It will be seen that the result of my inven tion is a bag similar to that shown in Fig. 4, with a flat bottom P, and that the bag is without seam, all parts being woven in, so that adjacent sides have common warp and weft threads, the warp-threads being common to all sides and the bottom of the bag. It will be a parent that a bag so made has superior qualities as to strength, smoothness, and finish and other features of advantage.

Having thus described my invention, the following is what I claim as new therein and desireto secure by Letters Patent:

1. A bottomed seamless bag, substantially as described.

2. A seamless bag having its bottom sub stantially flat and at right angles to its sides.

3. A seamless bag of woven fabric, the warp-threads of which are common to all the sides and the bottom of the bag.

4. A seamless-bottomed bag of woven fabric the weft-threads of which are common to all the sides of the bag.

5. A bottomed seamless bag of woven fab- I ric, the warp-threads of which are common to the sides and bottom of the bag and the weftthreads of which are common to the sides of the bag. I

6. A seamless-bottomed bag woven from one set of warp and weft threads.

7. A seamless-bottomed bag the bottom of wliich is formed of interwoven warp-threads on y.

8. A bottomed seamless bag of woven fabric the warp-threads of which are common to the sides and bottom of the bag, the weftthreads of which are common to the sides of the bag, and the bottom of the bag being formed of warp-threads only, a portion of the warp-threads forming the weft for the bottom of the bag.

9. The process of weaving'a seamless-bottomed bag which consists in weaving the weft across the warp around the four sides of the bag, and weaving a portion of the warpthreads as a weft into the remaining portion of the warp to form the bottom of the bag.

10. The process of weaving a seamless-bottomed bag which consists of weaving a length of fabric to form the front and two adjacent sides of the bag leaving a length of free weftthreads at each side of the fabric, cutting the outer warp-threads at each side at a distance beyond thewoven portion of thefabric to leave free ends of said out threads, folding up the sides of the woven fabric which form the sides of the bag, weaving the said free ends of the warp-threads as a weft into the uncut warp-threads from each side to form the bottom of the bag, then folding the woven portion of the bag and weaving the free weftthreads from both sides into the uncut warp threads to form the back of the bag substantially as described.

11. The process of weaving a seamless-bottomed bag, which consists in arranging a warp, dividing the warp into three sets of threads, weaving a portion of said warp including all three sets of threads with a weft to form the front and two sides of the bag, leaving the weft with a length of free ends at each side, cutting the outer two sets of warp threads to leave a length of free ends of the cut warp, weaving said free ends of warp into the middle set of warp-threads to form the bottom of the bag, and weaving the free ends of the weft into the middle set of warpthreads to form the back of the bag.

KASHICHI SAN O.

Witnesses SOJIRO FURUTA, MAsUHEI TAKATA. 

